High-precision positioning of a tool bar and a tool bit assembly
By forming a composite guideway positioning system and a dual cooling system through cross-shaped convex and concave guideways and concave and convex guideways, the problems of insufficient positioning accuracy and poor heat dissipation in the traditional tool holder and insert connection method are solved, and high-precision and high-efficiency machining is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIAXING WORLDIA DIAMOND TOOLS CO LTD
- Filing Date
- 2025-04-28
- Publication Date
- 2026-06-02
AI Technical Summary
Traditional tool holder and insert connection methods suffer from problems such as insufficient positioning accuracy, poor heat dissipation, and poor installation stability, which affect machining quality and efficiency, especially in industries with high precision requirements.
A composite guideway positioning system is formed by using cross-shaped convex and concave guideways and concave and convex guideways, combined with a dual cooling system to improve the connection stability and heat dissipation effect between the blade and the tool holder.
It improves the stability and vibration resistance of the tooling system, ensures cutting accuracy and surface quality, extends tool life, and enhances machining efficiency and quality.
Smart Images
Figure CN224309638U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of machining tool technology, and in particular to a high-precision positioning tool holder and insert assembly. Background Technology
[0002] The tool holder and insert assembly plays a crucial role in modern machining, widely used in metal cutting processes such as turning and milling. Through the effective combination of the tool holder and insert, efficient and precise machining of workpieces can be achieved, thus meeting the stringent requirements of various industrial sectors for machining accuracy and efficiency. This assembly not only improves machining accuracy but also effectively extends tool life, reduces production costs, and provides more possibilities for machining complex workpieces.
[0003] In the field of machining, the performance of cutting tools directly affects the dimensional accuracy and surface quality of machined parts. Traditional tool holder and insert connection methods have many shortcomings, such as insufficient positioning accuracy, poor heat dissipation, and poor installation stability, which seriously restrict the improvement of machining quality and efficiency. These problems are particularly prominent in industries with high precision requirements, such as aerospace and precision mold manufacturing. Therefore, developing a high-precision positioning tool holder and insert assembly that can overcome the above-mentioned defects has significant practical significance and market demand. Utility Model Content
[0004] To improve the installation accuracy and stability of tool holders and cutting inserts, this application provides a high-precision positioning tool holder and cutting insert assembly.
[0005] The high-precision positioning tool holder and insert assembly provided in this application adopts the following technical solution:
[0006] The high-precision positioning tool holder and blade assembly includes a tool holder and a blade. The blade is fixedly connected to the tool holder by a locking member. The bottom surface of the blade is provided with a cross-shaped convex-concave guide groove. The mating surface of the tool holder is provided with a concave-convex guide groove for perfectly matching the bottom surface of the blade. The cross-shaped convex-concave guide groove and the concave-convex guide groove form a composite guide groove positioning system.
[0007] By adopting the above technical solution, when the insert is subjected to shearing forces in different directions during operation, the cross-shaped convex and concave guide rail grooves on the bottom surface of the insert can constrain the insert from two vertical directions through the cross guide rail structure. Under the action of shearing forces in the horizontal and vertical directions relative to the insert mounting surface, the sidewalls of the guide rail grooves will be in close contact with the corresponding parts of the insert, resisting the shearing force through friction and structural blocking, preventing the insert from sliding or shifting during cutting, thereby improving the stability of the tool system, ensuring that the insert can accurately maintain its position under complex cutting conditions, and guaranteeing cutting accuracy and surface quality. The concave and convex guide rail grooves on the connection surface between the tool holder and the insert have guiding properties, allowing the insert to slide along the guide rail to the predetermined installation position before locking the insert, facilitating installation and replacement. The cross-shaped convex and concave guide rail grooves and the concave and convex guide rail grooves form a composite guide rail groove positioning system, increasing the contact area between the insert and the tool holder, making the connection between the two tighter. The guide rail groove structure forms a rigid connection between the insert and the tool holder. When the cutting force is applied to the insert, the force will be evenly transmitted to the tool holder through the guide rail grooves, avoiding the phenomenon of local stress concentration. Meanwhile, the constraint effect of the composite guideway positioning system also limits the vibration of the cutting tool and improves the vibration resistance of the tool system, thus improving the installation accuracy and stability of the tool holder and cutting tool.
[0008] Preferably, the tool holder has a locking screw hole, the blade has a mounting hole, and the locking element is an eccentric screw or a tapered screw. The eccentric screw or the tapered screw passes through the mounting hole and is connected to the locking screw hole, which is located in the concave-convex guide groove.
[0009] By adopting the above technical solution, during installation, the operator locks the blade and the tool holder with a locking device. When tightening, a component force perpendicular to the mating surface is generated, pressing the blade onto the tool holder. The locking force is converted into pressure perpendicular to the mating surface, thereby eliminating the gap between the blade and the tool holder. This results in a tighter fit between the blade and the tool holder, higher positioning accuracy, and helps to improve machining quality.
[0010] Preferably, the tool holder is provided with a dual cooling system. Cooling channels are provided on both sides of the side wall of the tool holder facing the blade and the workpiece. The cooling system sprays cooling gas or cooling liquid onto the blade through the cooling channels.
[0011] By adopting the above technical solution, a large amount of heat is generated during the cutting of the cutting tool. If the heat cannot be dissipated in a timely and effective manner, it will aggravate the wear of the cutting tool, shorten its service life, and increase the cost. Therefore, the dual cooling system sprays sandblasting cooling gas or liquid from the cooling channel to the cutting tool and the workpiece during the cutting process, which can reduce cutting heat and thus reduce the wear of the cutting tool.
[0012] Preferably, the two cooling channels are arranged at an angle, and their extensions intersect at the tip of the blade.
[0013] By adopting the above technical solution, the inclined design of the cooling pipe allows the cooling medium to reach the tip of the cutting tool directly, achieving precise cooling, improving heat dissipation, and increasing processing efficiency and quality.
[0014] Preferably, both the cross-shaped convex-concave guide groove and the concave-convex guide groove include a major axis and a minor axis. The cross-shaped convex-concave guide groove on the blade includes one major axis and two minor axes. The major axis of the cross-shaped convex-concave guide groove adopts a convex arc (diameter φ), and there is a certain distance L1 from the low plane of the blade to the convex arc φ. The minor axis of the cross-shaped convex-concave guide groove adopts a symmetrical concave V-shaped groove design. The distance between the concave point of the V-shaped groove and the convex point of the convex arc is [missing information]. The two minor axes are symmetrically arranged about the central axis of the blade. The distance between the central axis of the blade and the concave points of the V-shaped grooves on both sides is L, and L, L1, and L2 are all greater than zero.
[0015] By adopting the above technical solutions, the design of the convex arc and V-groove helps the insert to a certain extent to self-adjust and flexibly position itself. When the insert is subjected to forces in different directions during machining, the convex arc structure can better disperse stress, reduce local stress concentration, improve the stability and reliability of the connection between the insert and the tool holder, and reduce the risk of insert damage or loosening due to excessive stress.
[0016] Preferably, the included angle of the V-groove is α, and the angle α ranges from 90° to 150°.
[0017] By adopting the above technical solution, when the V-groove angle α is less than 90°, the guiding and positioning capabilities of the V-groove weaken, making the insert prone to wobbling and displacement during installation and use, affecting machining accuracy. Conversely, when α is greater than 150°, the V-groove opening becomes too large, reducing the positioning stability of the insert within the V-groove and making it prone to rotation or displacement during cutting. Therefore, setting the α angle range between 90° and 150° can improve the connection stability between the insert and the tool holder while ensuring sufficient positioning accuracy of the insert.
[0018] Preferably, the long axis of the concave-convex guide groove adopts a V-groove design, the short axis of the concave-convex guide groove adopts a convex arc design, the convex arc contacts the inclined surface of the V-groove, and the lower surface of the blade does not contact the plane of the blade holder.
[0019] By adopting the above technical solution, the tool holder positioning surface adopts a design opposite to that of the cutting tool. The long axis of the concave and convex guide groove of the tool holder positioning surface adopts a V-groove design, which is matched with the convex arc design of the cutting tool to form a complementary positioning structure. This further enhances the connection strength and stability between the cutting tool and the tool holder. Through the guiding and constraining effect of the V-groove, the cutting tool is prevented from rotating or shifting during the cutting process, ensuring that the cutting tool always maintains the correct position and posture.
[0020] Preferably, the tool holder has a limiting groove, and the end of the blade away from the workpiece is engaged in the limiting groove.
[0021] By adopting the above technical solution, the limiting groove can enhance the restraint effect on the blade and improve the stability of the blade.
[0022] In summary, this application includes at least one of the following beneficial technical effects:
[0023] 1. When the cutting insert is subjected to shearing forces in different directions during operation, the cross-shaped convex and concave guide grooves on the bottom surface of the insert constrain the insert from two vertical directions through the cross guide structure. Under the action of shearing forces in the horizontal and vertical directions relative to the insert mounting surface, the sidewalls of the guide grooves will make close contact with the corresponding parts of the insert, resisting the shearing forces through friction and structural blocking, preventing the insert from sliding or shifting during cutting, thereby improving the stability of the tool system, ensuring that the insert can accurately maintain its position under complex cutting conditions, and guaranteeing cutting accuracy and surface quality. The concave and convex guide grooves on the connection surface between the tool holder and the insert have guiding properties, allowing the insert to slide along the guide to the predetermined installation position before locking the insert, facilitating installation and replacement. The cross-shaped convex and concave guide grooves and the concave and convex guide grooves form a composite guide groove positioning system, increasing the contact area between the insert and the tool holder, making the connection between the two tighter. The guide groove structure forms a rigid connection between the insert and the tool holder. When the cutting force is applied to the insert, the force will be evenly transmitted to the tool holder through the guide grooves, avoiding the phenomenon of local stress concentration. Meanwhile, the constraint effect of the composite guide rail positioning system also limits the vibration of the cutting tool and improves the vibration resistance of the tool system, thus improving the installation accuracy and stability of the tool holder and cutting tool.
[0024] 2. The inclined design of the cooling pipes allows the cooling medium to reach the cutting tip directly, achieving precise cooling, improving heat dissipation, and increasing processing efficiency and quality;
[0025] 3. When the V-groove angle α is less than 90°, the guiding and positioning capabilities of the V-groove weaken, making the insert prone to wobbling and displacement during installation and use, affecting machining accuracy. Conversely, when α is greater than 150°, the V-groove opening becomes too large, reducing the insert's positioning stability within the V-groove and making it prone to rotation or displacement during cutting. Therefore, setting the α angle within the range of 90° to 150° ensures sufficient positioning accuracy for the insert while improving the connection stability between the insert and the tool holder. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the structure of the high-precision positioning tool holder and blade assembly according to an embodiment of this application.
[0027] Figure 2 This is a schematic diagram of the concave and convex guide groove structure according to an embodiment of this application.
[0028] Figure 3 This is a schematic diagram of the cross-shaped convex and concave guide groove according to an embodiment of this application.
[0029] Figure 4 This is a cross-sectional schematic diagram of the blade and tool holder assembly.
[0030] Figure 5 This is a schematic diagram of the convex arc φ design and concave V-groove design of the blade.
[0031] Figure 6 This embodiment demonstrates the cooling medium injection path.
[0032] Explanation of reference numerals in the attached figures:
[0033] 1. Tool holder; 2. Blade; 3. Cross-shaped convex and concave guide rail groove; 4. Concave and convex guide rail groove; 5. Locking element; 6. Cooling channel; 7. Convex arc; 8. V-groove; 9. Restriction groove; 10. Locking screw hole; 11. Mounting hole; 12. Cooling medium injection path. Detailed Implementation
[0034] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.
[0035] This application discloses a high-precision positioning tool holder 1 and blade 2 assembly, such as... Figure 1 and Figure 2 As shown, and in combination Figure 3As shown, the tool includes a tool holder 1 and a cutting blade 2. The tool holder 1 has a locking screw hole 10 in the vertical direction, and the cutting blade 2 has a mounting hole 11 in the middle in the vertical direction. The cutting blade 2 and the tool holder 1 are locked together by a locking member 5, which is an eccentric screw or a tapered screw. The tool holder 1 has a limiting groove 9. The cutting blade 2 has a double-ended symmetrical design, and both ends can be replaced, thereby increasing the service life of one cutting blade. The cutting tip of the cutting blade 2 at the end away from the workpiece is engaged in the limiting groove 9. The limiting groove 9 can enhance the restraint effect on the cutting blade 2 and improve the stability of the cutting blade 2.
[0036] like Figure 2 and Figure 3 As shown, and in combination Figure 4 and Figure 5 As shown, the lower end face of the blade 2 is provided with a cross-shaped convex-concave guide groove 3, and the mating surface of the tool holder 1 is provided with a concave-convex guide groove 4 for perfectly matching the bottom surface of the blade 2. The cross-shaped convex-concave guide groove 3 and the concave-convex guide groove 4 form a composite guide groove positioning system. Both the cross-shaped convex-concave guide groove 3 and the concave-convex guide groove 4 include a long axis and a short axis. The mounting hole 11 is located at the center of the long axis of the tool holder, and the locking screw hole 10 is located on the long axis of the tool holder 1. An eccentric screw or a tapered screw passes through the mounting hole 11 and is connected to the locking screw hole 10. When locking the blade 2 and the tool holder 1, the locking force is applied along the normal direction of the guide groove, pressing the blade 2 onto the tool holder 1, thereby eliminating the gap. The long axis of the blade 2 is convex, and the short axis is concave. The long axis of the tool holder 1 is concave, and the short axis of the tool holder 1 is convex. The long axis of the blade 2 is engaged with the long axis of the tool holder 1, and the short axis of the blade 2 is engaged with the short axis of the tool holder 1. The concave-convex guide groove 4 on the connecting surface of the tool holder 1 and the blade 2 allows the blade 2 to slide along the groove to the predetermined installation position before locking. When the blade 2 is working, it is subjected to shearing forces in different directions. The cross-shaped convex-concave guide groove 3 on the bottom surface of the blade 2 and the concave-convex guide groove 4 on the tool holder 1 engage with each other to constrain the blade 2 from two vertical directions. The groove and the protrusion are in close contact, resisting the shearing force through friction and structural blocking, thereby preventing the possibility of the blade 2 shifting position during cutting, thus improving the stability of the blade 2, ensuring that the blade 2 can accurately maintain its position under complex cutting conditions, and guaranteeing cutting accuracy and surface quality.
[0037] like Figure 4 and Figure 5As shown, the long axis of the cross-shaped convex-concave guide groove 3 on the insert 2 adopts a convex arc 7 (diameter φ). The convex arc 7 design helps the insert 2 to achieve a certain degree of self-adjustment and flexible positioning in the guide groove, which can evenly distribute the stress on the insert 2 to the surrounding area, reduce local stress concentration, and improve the strength and fatigue resistance of the insert 2. In addition, there is a certain distance L1 from the low plane of the insert 2 to the arc φ. The design of the L1 distance can control the relative position and fit clearance between the insert 2 and the tool holder 1, ensuring that the insert 2 has appropriate preload and motion accuracy during installation and use. The appropriate L1 distance can ensure that the insert 2 will not wobble due to excessive clearance when subjected to cutting force, which would affect the machining accuracy, nor will it cause installation difficulties or excessive frictional resistance between the insert 2 and the tool holder 1 due to insufficient clearance.
[0038] like Figure 4 and Figure 5 As shown, the cross-shaped convex-concave guide groove 3 has two short axes, which are perpendicular to the long axis and symmetrically designed around the center of the blade 2. It employs a symmetrical concave V-groove design. The distance from the convex point of the convex arc 7 to the V-groove 8 is L2. The distance from the central axis of the blade 2 to the concave points of the V-groove 8 on both sides is L. This double short-axis symmetrical design allows the blade to be used from both ends. When changing the blade head, the blade maintains its original connection structure. L, L1, and L2 are all greater than zero. The V-groove structure has a certain self-locking property. When the blade 2 is installed in the V-groove, under the action of cutting force, the convex arc 7 and the V-groove form a complementary positioning structure, increasing the friction between them. This makes the blade 2 more firmly fixed to the tool holder 1, preventing the blade 2 from loosening or falling off, further enhancing the connection strength and stability between the blade 2 and the tool holder 1. Through the guiding and constraining effect of the V-groove, the blade 2 is prevented from rotating or shifting during cutting, ensuring that the blade 2 always maintains the correct position and orientation.
[0039] like Figure 4 and Figure 5 As shown, the included angle of the V-groove 8 is α, with an angle range of 90°-150°. When the included angle α is less than 90°, the guiding and positioning capabilities of the V-groove are weakened, and the insert 2 is prone to wobbling and displacement during installation and use, affecting machining accuracy. When α is greater than 150°, the opening of the V-groove is too large, and the positioning stability of the insert 2 in the V-groove also decreases, easily causing the insert 2 to rotate or shift during cutting. Therefore, setting the angle α range between 90° and 150° can improve the connection stability between the insert 2 and the tool holder 1 while ensuring sufficient positioning accuracy of the insert 2.
[0040] like Figure 4As shown, the positioning surface of the tool holder 1 adopts a design opposite to that of the insert 2. The long axis of the concave-convex guide groove 4 adopts a V-groove 8, and the short axis of the concave-convex guide groove 4 adopts a convex arc 7 design. The convex arc 7 contacts the inclined surface of the V-groove 8. The lower surface of the insert 2 and the plane of the tool holder 1 do not contact each other, thereby reducing the contact area, lowering the coefficient of friction, reducing the frictional resistance between the insert 2 and the tool holder 1, improving the tool life and machining efficiency. At the same time, it can also provide a certain elastic deformation space. When the insert 2 is subjected to cutting force, the convex arc 7 structure can undergo slight elastic deformation, absorbing part of the impact energy, reducing the impact and vibration between the insert 2 and the tool holder 1, thereby protecting the insert 2 and the tool holder 1 from damage and extending the tool life.
[0041] like Figure 1 and Figure 6 As shown, the tool holder 1 is equipped with a dual cooling system. Cooling channels 6 are provided on both sides of the side wall of the tool holder 1 facing the blade 2 and the workpiece. The cooling channels 6 are inclined and their extension lines intersect at the tip of the blade 2. This allows the cooling medium to be accurately sprayed to the tip of the blade 2 and the contact position with the workpiece, achieving precise cooling, improving heat dissipation, reducing the wear of the blade 2, extending its service life, and improving processing efficiency and quality.
[0042] The implementation principle of this application embodiment is as follows: When the blade 2 is subjected to shearing forces in different directions during operation, the cross-shaped convex and concave guide rail groove 3 set on the bottom surface of the blade 2 can constrain the blade 2 from two vertical directions through the cross guide rail structure. Under the action of shearing forces in the horizontal and vertical directions relative to the mounting surface of the blade 2, the side wall of the guide rail groove will be in close contact with the corresponding part of the blade 2. The shearing force is resisted by friction and structural blocking, preventing the blade 2 from sliding or shifting during the cutting process, thereby improving the stability of the tool system and ensuring that the blade 2 can accurately maintain its position under complex cutting conditions, ensuring cutting accuracy and surface quality. In addition, the cross-shaped convex and concave guide rail groove 3 and the concave and convex guide rail groove 4 form a composite guide rail groove positioning system, which increases the contact area between the blade 2 and the tool holder 1, making the connection between the two tighter. The guide rail groove structure makes the blade 2 and the tool holder 1 form a rigid connection whole. When the cutting force is applied to the blade 2, the force will be evenly transmitted to the tool holder 1 through the guide rail groove, avoiding the phenomenon of local stress concentration. Meanwhile, the constraint effect of the composite guideway positioning system also limits the vibration of the insert 2, improving the vibration resistance of the tool system. Therefore, it can improve the installation accuracy and stability of the tool holder 1 and the insert 2. The dual cooling system can accurately cool and dissipate the temperature of the insert 2, reduce cutting heat, reduce the wear of the insert 2, and improve machining efficiency and machining quality.
[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A high-precision positioning tool bar (1) and insert (2) combination comprising a tool bar (1) and an insert (2), characterized in that: The blade (2) is fixedly connected to the tool holder (1) by a locking member (5). A cross-shaped convex-concave guide groove (3) is provided on the bottom surface of the blade (2). A concave-convex guide groove (4) is provided on the mating surface of the tool holder (1) for fully matching the bottom surface of the blade (2). The cross-shaped convex-concave guide groove (3) and the concave-convex guide groove (4) form a composite guide groove positioning system.
2. The high-precision positioning tool holder (1) and blade (2) assembly according to claim 1, characterized in that: The tool holder (1) has a locking screw hole (10), the blade (2) has a mounting hole (11), the locking element (5) is an eccentric screw or a tapered screw, the eccentric screw or the tapered screw passes through the mounting hole (11) and is connected to the locking screw hole (10), the locking screw hole (10) is located in the concave and convex guide groove (4).
3. The high-precision positioning tool holder (1) and blade (2) assembly according to claim 1, characterized in that: The tool holder (1) is equipped with a dual cooling system. Cooling channels (6) are provided on both sides of the tool holder (1) facing the workpiece and the blade (2). The cooling system sprays cooling gas or cooling liquid onto the blade (2) through the cooling channels (6).
4. The high-precision positioning tool holder (1) and blade (2) assembly according to claim 3, characterized in that: The two cooling channels (6) are inclined and their extensions intersect at the tip of the blade (2).
5. The high-precision positioning tool holder (1) and blade (2) assembly according to claim 1, characterized in that: The cross-shaped convex-concave guide groove (3) and the concave-convex guide groove (4) both include a long axis and a short axis. The cross-shaped convex-concave guide groove (3) on the blade (2) includes one long axis and two short axes. The long axis of the cross-shaped convex-concave guide groove (3) adopts a convex arc (7), and there is a certain distance L1 from the low plane of the blade (2) to the convex arc (7). The short axis of the cross-shaped convex-concave guide groove (3) adopts a symmetrical concave V-shaped groove (8) design. The distance between the concave point of the V-shaped groove (8) and the convex point of the convex arc (7) is L2. The two short axes are symmetrically arranged about the central axis of the blade (2). The distance between the central axis of the blade (2) and the concave points of the V-shaped groove (8) on both sides is L. L, L1, and L2 are all greater than zero.
6. The high-precision positioning tool holder (1) and blade (2) assembly according to claim 5, characterized in that: The included angle of the V-groove (8) is α, and the angle range of α is 90°-150°.
7. The high-precision positioning tool holder (1) and blade (2) assembly according to claim 5, characterized in that: The long axis of the concave-convex guide groove (4) adopts a V-groove (8) design, and the short axis of the concave-convex guide groove (4) adopts a convex arc (7) design. The convex arc (7) is in contact with the inclined surface of the V-groove (8), and the lower surface of the blade (2) is not in contact with the plane of the blade bar (1).
8. The high-precision positioning tool holder (1) and blade (2) assembly according to claim 1, characterized in that: The tool holder (1) is provided with a limiting groove (9), and the end of the blade (2) away from the workpiece is engaged in the limiting groove (9).